Denial of service in UniFi Protect G3 FLEX Camera

1) Resource exhaustion

EUVDB-ID: #VU54301

Risk: Medium

CVSSv3.1: 6.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:U/RC:C]

CVE-ID: CVE-2021-33820

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to application does not properly control consumption of internal resources. A remote attacker can send a huge amount of TCP SYN packet, trigger resource exhaustion and perform a denial of service (DoS) attack.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Camera G3 Flex: UVC.v4.30.0.67

External links

http://store.ui.com/collections/unifi-protect-cameras/products/unifi-video-g3-flex-camera
http://linuxhint.com/hping3/
http://github.com/Jian-Xian/CVE-POC/blob/master/CVE-2021-33820.md

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.